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An airplane, diving at an angle of 48º with the vertical, release a projective at an altitude of 830m. The projectile hits the ground 3.10 s after being released. What was the vertical component of its velocity just before striking the ground?
Suppose that the sound level of a conversation is initially at an angry 72 dB and then drops to a soothing 50 dB. determine the initial and final sound intensities
Illustrate w hat angular speed (in revolutions per minute) is needed for a centrifuge to produce an acceleration of 720 times the gravitational acceleration 9.8 m/s2 at a radius of 9.95 cm ?
A device used in radiation therapy for cancer contains 6.30×10-1 g of cobalt 2760Co (59.9333819 u). Determine the activity of the radioactive material
A high diver leaves the end of a 5-m-high diving board, and strikes the water 1.3 s later, 3 m beyond the end of the board. determine the velocity with which she enters the water
A bullet is fired horizontally from a 70 m tall building with a speed of 1100 m ? s. Calculate the vertical component of its velocity
How much heat flows from 1.00 kg of water at 38.0°C when it is placed in contact with 1.00 kg of 20°C water in reaching equilibrium, What is the change in entropy due to this heat transfer
given an electric dipole moment p, in a region of uniform Eo. determine the torque of the dipole moment
An air puck of mass 0.897 kg is tied to a string and allowed to revolve in a circle of radius 1.23 m on a frictionless horizontal table. What is the speed of the puck
A 78-kg base runner begins his slide into second base when he is moving at a speed of 4.2 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches base.
A cube is constructed of six copper plates joined at the edges by an insulating material. find the electrical potential in the center of the cube
A 74.8 g sample of copper at 143.2°C is added to an insulated vessel containing 165 mL of glycerol, C3H8O3 (l) (d = 1.26 g/mL), at 24.8°C. The final temperature is 31.1°C. The specific heat of copper is 0.385 J g-1°C-1
Two people carry a heavy electric motor by placing it on a light board 2.90m long. One person lifts at one end with a force of 370N, What is the weight of the motor
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